2018 Buick Lacrosse Engine Problems
- Complaints
- 4about this part
- Share
- 33%of 12 total for the year
- Median mileage
- 13,400miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the engine of the 2018 Buick Lacrosse, 33% of the 12 complaints for this model year. Where a mileage was given, the median is 13,400 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“If stopped uphill and the auto stop activates, when you release the brake the car can roll back, and the way people stop on top of you these days your car can roll back into them and you have to repair their car. Plus it actually takes more gas than my v8 2016 gmc sierra that doesn't stop when traveling from my fueling location to my home, per the cars own computer system”
NHTSA complaint #11160527, filed 2018-12, 200 miles“The 3.6 liter engine in my 2018 Buick Lacrosse Avenir only has 53,939 when we experienced a thermostat failure. The engine temperature was dead cold, and the dual electric fans were running non-stop. When I scanned the trouble code, I found PO128 which points to a faulty thermostat. Because the thermostat is buried under the intake manifold, we had the local Buick dealership replace it at a cost of over $800.00. I don't feel that a car with so few miles should be experiencing a thermostat failure. …”
NHTSA complaint #11623656, filed 2024-11Related service bulletins
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 11024485May 15, 2025The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 11020254May 7, 2025This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in…
- 11019503Apr 18, 2025This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California…
- 11017443Apr 2, 2025This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
- 11017263Mar 25, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11016942Mar 4, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11014230Jan 31, 2025This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11014233Jan 30, 2025This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large…
- 11013069Jan 9, 2025This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2019 | 3 | 43% |
| 2018 | 4 | 33% |
| 2017 | 5 | 14% |
| 2016 | 3 | 6% |
| 2015 | 1 | 2% |
| 2014 | 4 | 6% |
| 2013 | 31 | 24% |
| 2012 | 46 | 22% |
| 2011 | 30 | 18% |
| 2010 | 44 | 23% |
| 2009 | 5 | 5% |
| 2008 | 17 | 7% |
| 2007 | 9 | 4% |
| 2006 | 8 | 3% |
| 2005 | 6 | 2% |
Other parts of the 2018 Buick Lacrosse
5 complaintsFuel system
3 complaintsTransmission and drivetrain
3 complaintsVehicle speed control
2 complaintsBrakes
1 complaintsOther or unknown
1 complaints
← All problems reported for the 2018 Buick Lacrosse
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology